Предмет: Алгебра, автор: alazerkowin

решите срочно пожалуйста

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Автор ответа: fzyjww

0

Ответ:

1. в) -8

2. а) 8х²=5х². 8х²-5х²=0. 3х²=0. х²=0. х=0

б) х²-7х=0. х(х-7)=0. х=0,х-7=0. х=0,х=7

3. смотри фото

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